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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

USGS 420442087560901 42N11E-34.4g1

Cook County, Illinois
Latitude  42°04'38", Longitude  87°56'07" NAD27
Land-surface elevation 673 feet above NGVD29
The depth of the well is 1,822 feet below land surface.
This well is completed in the Cambrian-Ordovician aquifer system (S300CAMORD) national aquifer.
This well is completed in the Ordovician-Cambrian Systems (367OVCB) local aquifer.

Period of record
Begin Date End Date Levels
1955-02-10 1955-02-10 1

 
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